Style.css

::-webkit-scrollbar {
    width: 5px
}
::-webkit-scrollbar-thumb {
    background-color: #ddeefb
}
::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 3px white
}

body{
    height: 100vh;
    background: #fafafa;
    position: relative;
}
body > div{
    height: calc(100% - 20px);
    background: #4dadf7;
}
body > div > div:first-child,
body > div > div:last-child{
    height: 12%;
    padding-top: 10px;
}
body > div > div:nth-child(2){
    height: 76%;
}

input[type='text']:focus{
    outline: none;
}
input[type='text']{
    width: 100%;
    position: relative;
    font-size: 19px;
    border-color: #fff;
    border-radius: 17px;
    background: white;
    border-top: white;
    border-left: white;
    padding: 4px 15px;
}

#btnSendMsg:hover, #btnStartChat:hover{
    box-shadow: 0px 0px 8px 3px #1673c1;
}
#btnSendMsg, #btnStartChat{
    position: absolute;
    right: 0px;
    box-shadow: 0px 0px 8px 1px #1673c1;
    background: white;
    font-size: 15px;
    color: #035fa7;
    font-weight: bold;
    top: 4px;
    border-radius: 50%;
    border: none;
    width: 50px;
    height: 50px;
}


#msgPanel{
    overflow: auto;
}
#msgPanel > div{
    padding: 3px 13px;
    border-radius: 10px;
    background: #ddeefb;
    color: #555;
    margin-bottom: 10px;
    width: 90%;
    clear: both;
    font-weight: bold;
}
#msgPanel > div > .msg-body{
    word-wrap: break-word;
}
#msgPanel > div > .msg-by{
    text-align: right;
    color: #777;
    font-weight: lighter;
    font-size: 13px;
}
#msgPanel > div > .fa{
    font-weight: lighter;
    font-size: 13px;
}
#msgPanel > div > .fa-clock-o{
    color: #777;
}
#msgPanel > div > .fa-check{
    color: #4dadf7;
}
#msgPanel .my-msg{
    float: right;
    background: white;
}


#divStartChat{
    position: fixed;
    height: 100vh;
    background: #4dadf7;
    width: 100vw;
    left: 0px;
    top: 0px;
    text-align: center;
    z-index: 2;
}
#userInput{
    width: 30%;
    top: 35%;
    text-align: center;
}


#userName, #exitChat{
    background: white;
    position: relative;
    padding: 12px 30px;
    font-weight: bold;
    border-radius: 20px;
    box-shadow: 0px 0px 10px 6px #1493f5;
}
#userName{
    left: 5%;
}
#exitChat{
    left: 60%;
    background: #ffc3c3;
    cursor: pointer;
}